Mandrel-sleeve for phonograph-records.



W. C. RUNGB.

MANDREL SLEEVE FOR PHONOGRAPH RECORDS.

APPLICATION FILED APR. 22, 1909.

; 966,771. Patented Au '.9,1910. I

WITNESSES Wm; c. W mvnmm 2 W BYDZMMWM HISATTQRNEYS f of the city IUNI ED STATES PATENT OFFICE.

WALTER C. RUNG-E, OF CAMDEN, NEW JERSEY, ASSIGNOR TO ROYAL PHO NE PHONOGRAM COMPANY, OF BOSTON, MASSACHUSETTS, .A. CORPORATION OF MAINE.

MANDiREL-SLEEVE FOR PHONOGRAPH-RECORDS.

Toall whom it may concern:

Be it known that I, WALTER C. RUNG'E, a citizen of the'United States, and a resident of Camden, county of Camden, and State of New Jersey, have invented certain new and us ful Improvements in Mandrel-Slecves for Phonograph-Records, of which the following is a specification.

Some phonographs are provided with tubular mandrel sleeves which may be slipped .on and off the arbor of a phonograph and have phonograph records tubularly with them,

My invention relates to such a mandrel sleeve made capable of expanding and contracting for the purpose of respectively se curing and releasing a phonograph record.

In the accompanying drawings: Figure 1 is a side view of a mandrel sleeve embodying my improvement. Fig; 2 is a section through a portion of the circumference to illustrate the means of connecting segments which are comprised in the mandrel sleeve. Fig. 3 is a central longitudinal section of the mandrel sleeve. Fig 4- is a transverse section of the mandrel sleeve.

Similar letters of reference designate corresponding parts in all the figures.

A designates the body of the mandrel sleeve, It is oftubular form and made of a number of longitudinal segment shaped sections at. \Vhile these sections may be of any desired number, I have onlyshown three in this example of my invention, each of the three forming a third of the body.

The sections of the body are connected to gether at. their longitudinal edges and in such a manner that they may yield indepemlently so that the body as a whole may expand and contract. As here shown, a

groove a is formed in one of the longitudinal edges of each section a and in this groove a spring a is introduced. This spring consists of a strip of resilient meta-l and is bent longitudinally into bow shape. Its middle portion its in the groove (L2 and is retained there by a pin c which extends transversely through the groove. The ends of the spring a protrude into cavit-ies a formed in the opposite edge of an adjacent section a and extending obliquely therein.

Inside the several sections are made flaring at the ends and are screw threaded to receive rings a and c which are tapered and screw threaded to engage with the flaring Specification of Letters Patent. Application filed April 22, 1909.

engaged flexible and capable of'some distension; and

the other end, the ring a" or a, at that Patented Aug. .9; 1910. Serial No. 491.484.

screw threaded end portions of the sections a. of the mandrel sleeve. As here shown, the rings a" and a have flanges and the lat ter are milled at the edges to. facilitate the manipulation of the rings. Preferably the screw threads at both ends of the mandrel sleeve will be of the same character, or in other words, will both be right hand screws and of the same pitch. .ObXlOHSlYWlIOI] the rings are rotated in reverse directions to enter farther into the mandrel .slee zc the latter will be expanded. A contrary manipulation of the rings will permit the mandrel sleeve to contract. Preferably the mandrel sleeve will have at one end a circumferential lip of which segments will be formed upon the sei'eral sections (1. This lip will lorm' a. stop to insure the proper positioning of a record upon the mandrel sleeve.

Before inserting my mandrel sleeve into a phonograph record, said sleeve is contracted by screwing outwardthe rings at and a if indeed the sleeve not already small enough to slip easily into the record. The record having been placed upon the slec e, the rings a and a. are screwed inwardso as" to expand the sleeve or increase its diameter, thereby causing the said sleeve to fit tightly within the record. Such rotation of the rings a and c to expand the sleeve, may 85 be effected most. readily by grasping one of said rings in one hand and the other of said rings in the other hand, and rotatingihe t iwi rings simultaneously but in opposite directions; the motion being a slight twisting motion such as is readily given by the hands; The rings a." and (67 being entirely separate andcapable of independent rotation inop- .posite directions, it is not necessary to hold the record itself, when so turning said rings; and indeed, the fact that the two rings a and a are indeptmdent obviates all necessity of fingering the. record itself in doing this. The record preferably used is one that is by expanding the mandrel in this way, it may be exp'amflcd snfliciently far to put the record under tension, and under uniform tension. The fact that the two rings a and a are independent practically assures that, in turning said rings, the record will be put under uniform tension throughout, because if the mandrel starts to place one end of the slee'ie'under greater tension than ('lltlWllOl'G the greater tension is initially. will cease rotating in the mandrel sleeve, before. the ot'ltcrring will cease rotating. so that. the linal result is to produce substantially uniform tension'of the record at both ends thereot'. To remove a record from the mandrel sleeve the. rings a and 11 are 1'0- tated' backward. thus contracting the main, drel sleeve. to such extent that it ma he slipped out. oi the record easily.

'hat I claim is:

1. A phonograph record mandrel sleeve comprising in combination an expansible Ktubula};bod and a plurality of independent expandingmeans therefor. capable of'independent operation to cause the expansion or contraction of said sleeve at will. i

9. A phonograph record mandrel sleeve comprising in combination an expansible tubular bodyand two independent: expanth ing lneans therefor, located at opposite ends of-said sleeve, and capable of independent expansion or contraction of the latter. and.

each capable of independent rotation,

5. itphonograph record mandrel sleeve. comprising in combination an expansible tubular body. and expanding means therefor,comprising a plurality of rotary rings capable ofbeing rotated independently with respect: toone another. and each provided with inclined surfaces arranged to coaet with portions ot' said tubular bod) for the pnrpose ot causing expansion or contraction of said body. according to the direction in which such rings are rotated.

(i. A. phonograph record mandrel sleeve .dil'ect ion comprising in con'ibination an expansible tubular body. and expanding means there tor, contprrsinga plurality otrings rotatable independently with respect to one another, and; provided with s n taees tapering externally with respect to the axis .ot the rings. and arranged to coact with end portions of said t'ulntlan bod to cause expansion or contraction thereof. according to the l. phonograph re ort'l mam comprising in eom'linnttion an expanstble tubular body. and expanding means tlte refor. comprising a plurality bf expander-s arranged to'canseexpansion or contraction of such sleeve by theirrotation.suelt '6 said rings are rotated. v 1 V lrel sleeve pand'ers independent l rotata'ble with respect to one another and arranged to 'lavrotated in opposite direction relatively. tor the pur the pnrpose'ot' contractingsaid'sleevei 8.;\ phonogra ih record mandrel sleeve comprising in comlanation an expans ble tubular body. and expanding means there "170 pose o'l"expandingsaid sleeve. and also tor tor. comprising a plurality of exp-antlers ail P ranged to cause expansion or contraction of such sleeve by their rotation. such expanders independenth rotatable with respect to one another and arranged to ,berot'a-ted in opposite directions relatively. for the purpose'of expanding said sleeve. and also l'or the purpose of contracting said sleeve. saideX-- panders adapted -1'or manual rotation.

9. A phonograph record mandrel sleeve I comprising .in eombittat-ion an expansible tubular body. and screw threaded expand- ,ersscrewiug into the ends of the said sleeve, and capable of indepemlent rotation with re spect to one another. said texpa'nders arranged to be rotatedtin opposite directions relativel to expand said/sleeve, andllikewise to cause contraction of said sleeve, and adapted for manual operation." t

ln testimony whereof l'have asigned this specification in the ,presence ot' two sub.- scribing witnesses. 

